Use; Prerequisites; Prior To First Use; Preparation For Use - Dräger PSS BG 4 plus Maintenance Manual

Use

3 Use
3.1

Prerequisites

Check which protective clothing and which head protection

also needs to be worn during usage.
Follow local and national regulations on the use of

respiratory protective devices such as OSHA 1910.134.
The following requirements must be met so that the closed-

circuit breathing apparatus can be used:
The CO absorber (refillable cartridge) was filled within

2
the last 6 months.
The CO absorber (refillable cartridge or disposable

2
cartridge) was installed into the closed-circuit breathing
apparatus and leak-tested within the last 6 months.
The CO absorber was transported on a vehicle for no

2
further than 310 miles (500 km).
The compressed oxygen cylinder is full.

The leak-tightness and functional test on the closed-circuit

breathing apparatus showed no faults (see chapter 4.5 on
page 25).
Under the following prerequisites, the closed-circuit

breathing apparatus can be used multiple times by the
same user within 24 hours:
The officer-in-charge decides before each further use

whether the remaining oxygen supply is adequate for
use.
The cylinder valve is fully closed after every use.

This means that the breathing circuit is vented
automatically. The connecting piece is sealed with
the sealing cap.
The compressed oxygen cylinder and CO

are not replaced.
The closed-circuit breathing apparatus is stored upright

at a temperature of more than 32 °F (0 °C).
3.2

Prior to first use

1. Perform a visual inspection: Is the closed-circuit breathing
apparatus intact and complete?
2. Test the closed-circuit breathing apparatus (see chapter 4.5
on page 25).
3.3

Preparation for use

1. Open the closed-circuit breathing apparatus if necessary
(see chapter 3.3.1 on page 10).
2. Fit the CO absorber if necessary (see chapter 4.4.8 on
2
page 22). In this case, test the closed-circuit breathing ap-
paratus (see chapter 4.5 on page 25).
3. Fit the compressed oxygen cylinder if necessary
(see chapter 3.3.2 on page 11).
4. Insert the ice if necessary (see chapter 3.3.3 on page 12).
5. Test the correct functioning of the closed-circuit breathing
apparatus (see chapter 3.3.4 on page 12).
CAUTION
!
The closed-circuit breathing apparatus may only be
used when the functional test has not produced any
faults.
10
6. Close the closed-circuit breathing apparatus if necessary
(see chapter 3.3.1 on page 10).
7. Don the
(see chapter 3.3.5 on page 13).
3.3.1 Opening and closing the closed-circuit breathing
apparatus
Open the closed-circuit breathing apparatus as follows:
1. Slide the sliding bolts on the handle of the closed-circuit
breathing apparatus using your thumb and finger and tip
over so that they engage.
2. Fold out the protective cover until the guide and the two
pins on the lower edge are unlocked.
3. Unhook the pin and remove the protective cover.
Close the closed-circuit breathing apparatus as follows:
1. Attach the guide and the two pins on the lower edge of the
cover in the device.
absorber
2
2. Close the protective cover.
3. Tilt the sliding bolts and slide outwards.
Page 10
closed-circuit breathing
Dräger PSS BG 4 plus
Draeger Training 11/16 rev 1
apparatus
30321851.eps
30421851.eps